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Flowering plum has mixed fire evidence, with conditional landscaping support and an explicit call for further research.
FireSmart BC lists Prunus triloba as fire resistant while flagging it for additional research. Both parts of that assessment matter. The favorable label should be accompanied by the program's stated uncertainty rather than presented as an unqualified finding.
Alaska's forestry program names the same shrub as flowering almond. It includes the plant among examples for Alaska firewise landscapes provided they are appropriately placed and maintained. This is a condition of the Alaska recommendation, separate from the research flag in British Columbia.
The shrub belongs to the rose family and is recorded as introduced in Illinois. For the fire question, the important distinction is between qualified support for landscape use and a firm fire-resistance determination. A gardener can consider the two recommendations while retaining the research qualification and the source-specific requirement for placement and upkeep.
Form
shrub
Rated in
Alaska; British Columbia
On this lot
1. Fire evidence and conditions
Fire evidence
Mixed evidence — location does not change the cited classification.
Alaska Division of Forestry opens with the wildfire threat to Alaskans and publishes Alaska firewise-landscape examples. FireApproved publishes 58 exact source owners from its 60 taxon entries and holds the taxon-free fern label. State publication scope does not establish suitability for every Alaska climate, site, or home-ignition-zone placement.
2. Why this plant is relevant here
State distribution
Documented in ID, IL, KY, MN, OR, PA, WA.
Native range
Introduced / established
2 sourced range or established records. This is not an invasive warning.
USDA hardiness
3. Legal, ecological, and broader status
Legal-list status
Seed-list status
Reported invasive here
Broader regional context
Federal context
How to read this page
The status above is computed from the cited rows below: independent recommendations can support a fire-resistant result, an avoid row can produce keep-away, and disagreement stays visible as conflict. Placement notes preserve each source’s own scheme rather than translating unlike rules into one scale. This is evidence about a plant, not permission to plant it in every part of the defensible space; Zone 0 remains noncombustible.
Native and introduced range evidence
These are exact U.S. botanical-area records from the cited range source. Native and
introduced describe biogeographic relationship, not fire performance or planting approval.
Doubtful and extinct rows stay visible but do not count as current presence.
The lossless worldwide derivative is retained once in the research corpus; object pages repeat only exact U.S. areas needed by the local lens. The JSON twin carries the same page assertions.
Where its sources say to plant it
Placement rules below use each source's own distances or named zones, tied to its rating.
They are not interchangeable with the directory's current Zone 0 guidance.
Protect Your Home from Wildfire: Shrubs [Alaska DNR brochure sections] (with its recommendation)
The evidence
Grouped by what each source concluded. Primary evidence rated the plant itself
(a lab, field program, or original curation); corroboration compiled or
republished another source's rating and resolves to its root lineage.
